Thematic Programs

Discrete Approaches to the Dynamics of Fields and Space-Time


Discrete approaches to space-time have been playing an important role in lattice gauge theory, dynamical triangulation of quantum gravity and other formulations. The various approaches using non-perturbative discrete formulations make numerical calculation possible. We think that discrete approaches will gradually become indispensable, even for a possible new formulation beyond the standard model and for Planck scale physics. Considering the development of non-perturbative formulations of superstring theory and the gauge/gravity correspondence, the discrete approaches to the dynamics of fields and space-time are getting increasingly important. They also become a promising tool in condensed matter physics and quantum information theory.
In this workshop we aim to create a platform for researchers working in the field described above to discuss and exchange ideas for further new developments. As concrete subjects, we discuss: lattice gauge theory, large N gauge theory, lattice supersymmetry, field theories on non-commutative space-time, gauge/gravity correspondence, quantum gravity, matrix models of non-perturbative formulation of string theory, lattice gravity, tensor models, etc. Recent developments in condensed matter physics which are closely related to particle physics will be discussed as well.
This workshop is one of a series of workshops starting in 2010 at YITP, 2012 at RIKEN, 2013 at KEK, 2014 at Keio University, 2015 at the Okayama Instituten of Quantum Physics, 2016 at Shizuoka University and 2017 at APCTP. This workshop is an event within the thematic program "String-Math 2018" of Tohoku Forum of Creativity.


September 9, 2018 – September 12, 2018


TOKYO ELECTRON House of Creativity 3F, Lecture Theater, Katahira Campus, Tohoku University [Access]


Masafumi Fukuma (Kyoto University)
Daisuke Kadoh (Keio University)
Noboru Kawamoto (Hokkaido University)
Taigen Kawano (Kyoto University)*
Yoshio Kikukawa (University of Tokyo)*
Luca Lionni (Kyoto University)*
Takaki Matsumoto (University of Tsukuba)*
Nobuyuki Matsumoto (Kyoto University)*
Hisayoshi Muraki (Sogang University)*
Shinsuke Nishigaki (Shimane University)
Jun Nishimura (KEK)
Tomotoshi Nishino (Kobe University)*
Naoki Sasakura (Kyoto University)
Matsuo Sato (Hirosaki University)*
Yuki Sato (Nagoya University)
Fumihiko Sugino (Institute for Basic Science)
Sotaro Sugishita (Osaka University)*
Masaki Tezuka (Kyoto University)*
Asato Tsuchiya (Shizuoka University)
* = Invited speaker


Satoshi Watamura (Tohoku University)*
Tsuguhiko Asakawa (Maebashi Institute of Technology)**
Hiroyuki Fuji (Kagawa University)
Masafumi Fukuma (Kyoto University)
Goro Ishiki (University of Tsukuba)
Daisuke Kadoh (Keio University)
Issaku Kanamori (Hiroshima University)
Noboru Kawamoto (Hokkaido University)
So Matsuura (Keio University)
Shinsuke Nishigaki (Shimane University)
Jun Nishimura (KEK)
Naoki Sasakura (Kyoto University)
Yuki Sato (Nagoya University)
Fumihiko Sugino (Institute for Basic Science)
Hiroshi Suzuki (Kyushu University)
Asato Tsuchiya (Shizuoka University)
Yoshiyuki Watabiki (Tokyo Institute of Technology)
* = Chair
** = Co-Chair

Time Schedule  [Oct. 01, 2018 Updated]

Sunday, September 9, 2018
Chair: Satoshi Watamura
13:30 – 14:45
Yoshio Kikukawa (University of Tokyo)
On the gauge invariant path-integral measure for the overlap Weyl fermions in 16 of SO(10)  Slides
15:00 – 16:15
Tomotoshi Nishino (Kobe University)
Tensor Network Formulations  Slides
16:30 – 17:45
Daisuke Kadoh (Keio University)
Supersymmetric gradient flow
Monday, September 10, 2018
Chair: Issaku Kanamori
9:30 – 10:45
Sotaro Sugishita (Osaka University)
Deep learning and AdS/CFT  Slides
11:00 – 12:15
Luca Lionni (Kyoto University)
Escaping the branched polymer phase in dynamical triangulations  Slides
12:15 – 14:00
Lunch Break
Chair: Goro Ishiki
14:00 – 15:45
Canonical tensor model through data analysis --- Dimensions, topologies, and geometries
Naoki Sasakura (Kyoto University)  Slides
Taigen Kawano (Kyoto University)  Slides
(including 15-min. break)
16:00 – 16:45
Fumihiko Sugino (Institute for Basic Science)
Highly entangled quantum spin chains and their extensions by semigroups  Slides
17:00 – 17:45
Yuki Sato (Nagoya University)
Understanding zero-temperature criticality of Ising model on 2d dynamical triangulations  Slides
18:30 –
Tuesday, September 11, 2018
Chair: Yuki Sato
9:30 – 10:45
Matsuo Sato (Hirosaki University)
Non-perturbative Formulation of Superstring Theory Based on String Geometry  Slides
11:00 – 12:15
Asato Tsuchiya (Shizuoka University)
Emergence of chiral zero modes in the Lorentzian type IIB matrix model
12:15 – 14:00
Lunch break
Chair: So Matsuura
14:00 – 15:15
Masaki Tezuka (Kyoto University)
Level statistics and Lyapunov spectrum of the SYK model
15:30 – 16:15
Shinsuke Nishigaki (Shimane University)
Janossy densities for chiral random matrix ensembles and multi-flavor two-color QCD  Slides
16:30 – 17:15
Masafumi Fukuma (Kyoto University)
Gradient flow and the renormalization group
17:30 – 18:15
Nobuyuki Matsumoto (Kyoto University)
Applying the generalized Lefschetz thimble method with parallel tempering algorithm to the sign problem in the Hubbard model away from half filling
Wednesday, September 12, 2018
Chair: Hiroyuki Fuji
9:30 – 10:45
Jun Nishimura (KEK)
Space-time structure in the Lorentzian type IIB matrix model
11:00 – 11:45
Takaki Matsumoto (University of Tsukuba)
Berezin-Toeplitz quantization and diffeomorphisms for fuzzy spaces
11:45 – 13:30
Lunch break
Chair: Tsuguhiko Asakawa
13:30 – 14:15
Hisayoshi Muraki (Sogang University)
Open KdV hierarchy and minimal gravity on disk
14:30 – 15:30
Noboru Kawamoto (Hokkaido University)
Quantization of interacting topological super point particle field theory  Slides


Email: watamura* (change*to @)